Cross-border tax & wealth · ~165 countries

Your whole cross-border position, in one screen.

Tell WideScope where you live, the passports you hold, and what you own. It shows the tax you really pay, how much is avoidable, the cheapest place to live, and what your heirs would owe — the analysis a family office charges 1% a year for.

WideScope position summary: the avoidable-tax headline, wealth and tax figures, cheapest place to live, and the year-round watchlist
What it does

One model of everything that can tax you.

It applies the published headline rates for about 165 countries to your exact holdings and plans — and always shows the rate it used.

Avoidable tax

The leak, named

Same investments, smarter holding — the dividend route fix, the Ireland-fund question, and exactly what each costs you every year.

Where to live

Cheapest place, ranked

Every country ranked for your portfolio, gains included — so a no-tax move is weighed against its inheritance and exit costs.

Passing it on

Estate & the hidden US tax

What your heirs owe, including the brutal US estate tax on US-registered shares and property that most people never see coming.

Income character

Funds taxed for real

SPYI, JEPI, QYLD, REITs and MLPs taxed by how their distributions actually behave — not the headline yield.

Fee x-ray

The 1% over a lifetime

The yearly cost of advisor and fund fees, and the fortune they quietly compound away over twenty years.

Life events

The big one-offs

Selling a business, an inheritance, a gift, a pension drawdown, buying property — usually the largest tax decisions of all.

Residency

Who can claim you

From the days you spend, which countries can tax you as a resident — and the 183-day line before you cross it.

US passport

The tax that follows you

Worldwide taxation, the 3.8% surtax, PFIC, CFC/GILTI and the FBAR/FATCA reporting that no move removes.

Special regimes

New-resident deals

UK FIG, Italy and Greece flat tax, Beckham, non-dom, Israel and more — and what each would actually save you.

Why WideScope

A family office on your own server.

The screening a wealth manager runs once a year, as a tool you own — fast, private, and showing its working.

~165 countries
0 runtime dependencies
100% self-hosted
MIT open source

Shows its working

Every figure names the rate behind it and lists what it does not cover. A screening tool, never a black box.

Private by default

Self-hosted: your holdings and plans stay on your own server. Nothing tracked, nothing sold.

Free & open

Open source under MIT — run it, read it, change it, host it your way.

Get started

See your position in a minute.

Open WideScope, add where you live and what you own, and read your whole cross-border position on one screen.

WideScope is a screening tool, not advice — confirm with a professional before you move country, sell a large holding, or restructure.